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Is x/12 > y/40 ?

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Is x/12 > y/40 ? [#permalink]

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New post 05 Nov 2017, 02:15
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Difficulty:

  25% (medium)

Question Stats:

84% (00:58) correct 16% (00:41) wrong based on 55 sessions

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Kudos [?]: 135332 [1], given: 12687

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Re: Is x/12 > y/40 ? [#permalink]

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New post 06 Nov 2017, 04:15
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Bunuel wrote:
Is x/12 > y/40 ?

(1) 10x > 3y
(2) 12x < 4y



Question rephrased: Is 10X > 3y??

(1) 10x > 3y

This is a fact to prove question above.

Sufficient

(2)12x < 4y.......y > 3x

Let x = 0 , y=1............Answer is No

Let x =1 & y =3.1.......Answer is Yes

Insuffceint

Answer: A

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Re: Is x/12 > y/40 ? [#permalink]

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New post 06 Nov 2017, 07:15
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Bunuel wrote:
Is x/12 > y/40 ?

(1) 10x > 3y
(2) 12x < 4y


x/12 > y/40

The above statement can be rephrased as is x > 0.3y?

(1) 10x > 3y
=> x > 0.3y - Sufficient

(2) 12x < 4y
=> x< (1/3)y
x < 0.33y
So x can be .32y or .28y - Not sufficient.

Hence A

Cheers!

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Concentration: Finance, Economics
GMAT Date: 09-28-2012
WE: Accounting (Manufacturing)
Re: Is x/12 > y/40 ? [#permalink]

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New post 11 Nov 2017, 08:20
I. 10x > 3Y
Dividing sides by 120, X/12 > Y/40. Hence sufficient.
II. 12x < 4y
Since x/12 > y/4, therefore, 40x > 12y. Dividing by 3, 40x/3 > 4y or 13.33x > 4y. Now, we dont know from this whether 12x > or < 4y. Insuffucient.
A

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Re: Is x/12 > y/40 ?   [#permalink] 11 Nov 2017, 08:20
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